Buried elastic seat seal gate valve

Abstract

The invention relates to a buried elastic seat seal gate valve. A rotating shaft head is arranged above a valve rod and controls the valve rod through a thrust bearing, a spring is arranged in a gap between the upper end of the valve rod and the thrust bearing, a gasket is arranged between the thrust bearing and the valve rod, and the lower end of the valve rod communicates with a valve plate. A valve body, a valve deck, a gland and a valve box are all made of nodular cast iron, and therefore scouring and erosion of underground media on a sealing face can be reduced. A cross rod for stabilizing the valve rod is arranged at the bottom end of an outer pipe to form a stable structure, an outer pipe protection sleeve is additionally arranged, the gland and the outer pipe protection sleeve are made of high-density polyethylene materials, and therefore the defects that a common gate valve is poor in sealing, elastic fatigue is caused, and gaps of components rust can be overcome. The good sealing effect is achieved through the compensation effect of micro elastic deformation generated by an elastic valve, and the buried elastic seat seal gate valve has the remarkable advantages of being safe, good in sealing performance, long in service life, wide in application place and the like.

Description

technical field [0001] The invention relates to the technical field of elastic seated gate valves, in particular to a buried elastic seated gate valve. Background technique [0002] The traditionally used elastic seat gate valve has a narrow scope of application, limited to wellheads and underground passages. It is not suitable for complex terrains due to the common simple settings, and it is not suitable for industrial buildings and medical sites. It is prone to water leakage or rust, and the traditional During the working process of the cast iron gate valve, it collides with or overlaps with other objects and causes breakage. In addition, the traditional gate valve is not equipped with protective measures when it is installed and used. Vulnerable to injury and cause the gate valve company to assume legal compensation obligations. [0003] In this regard, the present invention designs a buried elastic seated gate valve, which has the obvious advantages of safe device, good...

AI Technical Summary

Problems solved by technology

[0002] The traditionally used elastic seat gate valve has a narrow scope of application, limited to wellheads and underground passages. It is not suitable for complex terrains due to the common simple settings, and it is not suitable for industrial buildings and medical sites. It is prone to water leakage or rust, and the traditional During the working process of the cast iron gate valve, it collides with or overlaps with other objects and causes breakage. In addition, the traditional gate valve is not equipped with protective measures when it is installed and used. Vulnerable to injury and cause the gate valve company to assume legal compensation obligations

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